Fiat Allis 10C with transmission oil transferring to the backend

[bravo-harris]

Now it is getting more complex.I have cleaned both screens steering and transmission on the left and right side.

 

[Queenslander]

I think if I was going to do the test that you mentioned, I’ld do it before disturbing anything else.
If the sc pump is still pumping oil to the backend you should see it at the port that No.27 covers.
This is off a 14, but I assume that the 10 is similar.

 

[Dugandan]

Hello Bravo-Harris, Queenslander and DMiller,
Looking at my machine and the manuals I have made a list which may help (1 page PDF attached). Also not sure if you have parts catalogue. I have it in PDF but can't send on this forum as it is too large. Let me know if you need it, there may be another way.

 

[DMiller]

Got to digging thru some of my old Allis stuff. Rails on the 14 will be 7.484 pitch, Deere 750C Cat D5H 7NC or 8RC s/n prefix should also be these dimensions as a close enough match, the Deere LGP will be taller links(119mm) where standard rails were 110mm both 64mm bushing OD, 14 B&C will be 115mm height, 60mm bushing where any sprocket wear 14D could have 116mm height and 65mm bushing should be able to use the Deere rails.

If have access to South American suppliers the may still have access for the FA rails or supply from Italy or Korean sellers.

 

[bravo-harris]

Can you help to locate the other two screen filters on the torque converter and the two on the steering/brake/clutch circuit.These have never been cleaned.

 

[bravo-harris]

Hello Bravo-Harris, Queenslander and DMiller,
Looking at my machine and the manuals I have made a list which may help (1 page PDF attached). Also not sure if you have parts catalogue. I have it in PDF but can't send on this forum as it is too large. Let me know if you need it, there may be another way.

I have a parts manual.

 

[bravo-harris]

Got to digging thru some of my old Allis stuff. Rails on the 14 will be 7.484 pitch, Deere 750C Cat D5H 7NC or 8RC s/n prefix should also be these dimensions as a close enough match, the Deere LGP will be taller links(119mm) where standard rails were 110mm both 64mm bushing OD, 14 B&C will be 115mm height, 60mm bushing where any sprocket wear 14D could have 116mm height and 65mm bushing should be able to use the Deere rails.

If have access to South American suppliers the may still have access for the FA rails or supply from Italy or Korean sellers.

Got a quote from Italy and China.

 

[DMiller]

Berco was generally what came on these, some had Simmel.

 

[DMiller]

Been over 25 years since under one of these. Some screens as IIRC remember appeared as Banjo style fittings for lines on the Trans case and torque housing. the 'Bolt' was removed from the line head and strainer attached at the end, similar to depicted fitting earlier post.

 

[Queenslander]

Dugandan’s list, in post 23, gives an excellent description of the appearance and location of all five filters.
The carrier that I posted the photo of is on the rear centre cover and holds the return filter.
Not related to your problem, but the tiny vent in that cover, No 29 and 30, is the only breather for the rear compartment.

 

[bravo-harris]

Found the location drawing that you sent. thanks!

 

[bravo-harris]

Hello Bravo-Harris, Queenslander and DMiller,
Looking at my machine and the manuals I have made a list which may help (1 page PDF attached). Also not sure if you have parts catalogue. I have it in PDF but can't send on this forum as it is too large. Let me know if you need it, there may be another way.

thanks for sending location info for screen/filters!

 

[Dugandan]

Found the location drawing that you sent. thanks!

thanks for sending location info for screen/filters!

You are welcome. I understand you are grappling with things at the moment, it can be hard.

 

[bravo-harris]

Hi guys. We located and cleaned all 5 filters. None were that bad, the worst being the horizontal filter on the torque converter. We removed the scavenger pipe and used air pressure to ensure no blockage. We also removed the in and out transmission pipe going into the cooler and also applied air pressure to ensure no blockage. At the rear vertical filter, we noticed that the base of the oil bath container had a small machined hole about 1/16" which we bronzed to prevent oil escaping into back end. We ran the machine without armour plate for 2 hours and transmission oil continues to transfer to back end. We also replaced 2 missing O rings on the internal oil pipelines inside the back end. Please help.

 

[Queenslander]

I would be tempted to run it briefly without oil in the backend.
If oil still comes out of one of the lines where you replaced the o rings you will know that it is entering via the double pump.
The hole that you brazed up would be to allow the filter canister to drain when the machine is not running.
All the oil that passes through that filter ends up in the back end after lubricating the bevel gear, brakes and clutches.

 

[Queenslander]

By running it briefly, I mean standing still at a slow to medium idle for a minute or two.

 

[bravo-harris]

Hi guys. In doing our filter cleaning exercise, we pulled the large nut on top of the torque converter (between feet from operators seat) which is a hydraulic pressure relief valve and noticed that the shims were missing and not holding the pressure. In other words, the machine is running with the pressure relief valve open. Kindly send the diagram from the manual and how to set the right pressure release. Thanks in advance!

 

[Dugandan]

Hello Bravo-Harris,

I trust the attached 2 files will be a start.

The manuals have diagrams and references to both the "Transmission Clutch" and the "Torque Converter" models all mixed up. The correct diagrams and text (Torque Converter for you) are both section "b" in the attached. Section a in both cases refers to the "Transmission Clutch" model, so just ignore those sections.

Refer to Section b on Page 3.14 of the Service Specification Manual which shows three pressure adjustment washers, I think this is what you have found are missing???

Refer also to section b on Page 36 and 37 of the Service Manual Transmission which states briefly the way to vary the pressure.

I hope this is helpful.

 

[Dugandan]

Hello Queenslander,
Wondering if you can help with a query.
Could you tell me what these disc things are on the attachment on post 22 please? Do they have a function? (I assume you have had a close-up look at them.) They look like a plug of some sort. On mine, all I can see on the outside is some cement type substance, apparently to seal the hole, but with a central hole, looks like a small allen key might go in there. I do not see two shiny metal discs as in the drawing/photo you posted. Thanks.

 

[Queenslander]

The photo I posted is from a 14, the same as your loader, and could be a little different from your dozer.
Iam certain that the discs are plugs from the casting/machining process.
When we installed a rebuilt converter and transmission, the only adjustment that we attended to was the transmission pressure regulating valve.